.previewWrap{
    position: relative;
}
.previewLable{
    display: flex;
    width: 128px;
    height: 128px;
    border: 1px dashed gray;
    justify-content: center;
    align-items: center;
    font-size: 48px;
    position: absolute;
    top: 0;
    left: 0;
}

.previewImg{
    display: block;
    position: absolute;
    top: 0;
    left: 0;
}